1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.myfaces.shared_orchestra.util;
20
21 import java.util.Iterator;
22 import java.util.NoSuchElementException;
23
24
25 /**
26 * Iterator without elements
27 *
28 * @author Anton Koinov (latest modification by $Author: grantsmith $)
29 * @version $Revision: 472630 $ $Date: 2006-11-08 15:40:03 -0500 (Wed, 08 Nov 2006) $
30 */
31 public final class NullIterator implements Iterator
32 {
33 //~ Static fields/initializers -----------------------------------------------------------------
34
35 private static final NullIterator INSTANCE = new NullIterator();
36
37 //~ Methods ------------------------------------------------------------------------------------
38
39 public static final Iterator instance()
40 {
41 return INSTANCE;
42 }
43
44 public boolean hasNext()
45 {
46 return false;
47 }
48
49 public Object next()
50 {
51 throw new NoSuchElementException();
52 }
53
54 public void remove()
55 {
56 throw new UnsupportedOperationException(this.getClass().getName() + " UnsupportedOperationException");
57 }
58 }